Compex R&D Doc No: JTAG_V1.0 Description How to JTAG back to Compex loader

JTAG to Compex Loader
V1.0
Compex R&D
Description
Revision
1.0
Date
18th Dec 2008
Doc No: JTAG_V1.0
How to JTAG back to Compex loader
Description
Initial Release
Arranged By
Jojo
Preparation
1. OCD Commander 2.5.4
2. upbios.tst (same for all the Compex device)
3. zMylo.bin (different device have different zMylo file)
4. myloram file and .mac file
5. put all the files into the same folder
6. JTAG cable
1.
2.
3.
4.
5.
Steps
Install the OCD Commander to your PC
Plug the JTAG cable to the JTAG port of the
device
Run OCD Commander program
Set “Target Processor” for the particular
device
eg. WP18 – INTEL, IXP422
WP188 – INTEL, IXP422
WP54 – MIPS, EJTAG 2.5,32bit
WP543 - MIPS, EJTAG 2.5,32bit
Click OK.
If there is an error message “Error response
from INITIALIZE...”, please check the JTAG
cable connection.
Close the OCD Commander program and
restart Step 3.
If there is no error message, you may proceed.
Picture
JTAG to Compex Loader
V1.0
6.
Click on the “Macro” button and select the
.mac file.
Click OK.
7.
The process will run until you see “go”
8.
Open command prompt.
Tftp upbios.tst file
tftp zMylo.bin file(please observe the DIAG
LED will be off later on)
Command:
tftp -i 192.168.168.1 put upbios.tst
tftp -i 192.168.168.1 put zMylo.bin
Tip:
Try to ping before tftp.
Some board like WP188 have 1 or 2 Ethernet port.
Some file only support one of the Ethernet port.
9.
10.
11.
12.
If either of the file fail to be load during tftp,
please close the OCD Commander program
and restart step 3.
Power off the device and unplug JTAG cable.
Power on the device and tftp the firmware into
the device.
Reboot when done.
FAQ’s
1.